For two days in a row, my new TiVo HD has been unable to record a baseball game on Comcast Sports Net Bay Area in HD. The first time, it tried to record for the full 3.5 hrs I had the Wish List setup for, but didn't decode anything. It simply created an empty file that it automatically deleted at the end of the game. The history said there was nothing happening on the channel. So I wrote that off to a last-minute guide change. But the second time, I caught it in the act. Two hours into the game, TiVo had been trying to decode the program, and wrote nothing to the disk. So I stopped it. Going back to live TV, the game was perfectly viewable and recordable from that point on. I suspect this has something to do with the fact that games on Comcast Sports Net's HD channel don't start exactly on time; sometimes you get a few seconds of dead air before you get any programming, and when the programming starts the TiVo can't decode the stream. But that's just a theory. This is a new TiVo HD with the WD expander and one M-Card from Comcast.